Combined typewriting and computing machine



H, L. PHMAN. COMBINED TYPEWRITING AND COMPUHNG MACHINE. 7

APPLICATION FILED JAN.2T,19H.

.1,%8Q,Q3& Paten'td Mar. 2, 1920.

4 SHEE SSHEET I.

H. L. PITMAN.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

APPLICATION FILED I/I,II,.27, 19w.

1,332,233. I menmd Mar. 2; 1920.

4 SHEETSSHEET 2 Af/Of' y H. L. PITI JIAI I.

COMBINED TYPEWRIIING AND COMPUTING MACHINE.

APPLICATION FILED INLET. I917.

Patented Mar. 2, I920.

II,E382 @8@ 4 SHEETSSHEET3.

H. L. PITIVIAN.

COMBINED TYPEWRITING AND COMPUTINGMACHINE.

APPLICATION HLED IMLZY, 1917.

1,83%,233. Patentd Mar. 2, 1920.

4 SHEETS SHEET 4- UNITED STATES-PATENT OFFICE.

HENRY L. IPI'IMAN, OF 'EAsT ORANGE, NEW JERSEY, ASSIGNOR T0 UNnERwooD COMPUTING MACHINE COMPANY, or NEW YORK, N. Y., A CORPORATION OF NE YORK.

7 Application filed Jannary 27, 1917. Serial No. 144,825.- I

[b all urlwm it may concern.

Be it known that I, HENRY L. PI'liWIAI\',

a citizen of the United States, residing in -East Orange, in the county of Essex and especially to the type known as key-driven.

machines, and is an improvement on my application, Serial No. 24,390, filed April 28, 1915. The present improvement deals' more specifically with ultra-decimal computations in connection with decimal computations.

- In certain types of work it is desirable to have on the work-sheet decimal items and other items which may notbe entirely decimal. The present machine is arranged to take care of such classes of work whereby the same master wheel mechanism may drive computing heads or totalizers which are wholly decimal. other computing heads or totalizers which are partly decimal and partly ultra-decimal and even computing heads which are arranged to compute in the sterling system. This is accomplished by varying the driving ratio within the computing head itself, so that the master wheel mechanism which is driven by the numeral keys may be substantially the same. The mechanism for carrying over from the fraction dial wheels to the decimal dialwheels is arranged to avoid interference with the additional gearing to the fraction dial wheels, and to carry properly to the decimal dial wheels.

Other features and advantages will hereinafter appear.-

In the accompanying drawings,

Figure 1 is a vertical section from front to rear of the machine with parts omitted to simplify the showing.

Fig. 2 is an enlarged front view in elevation showing the driving of one of the totalizers which computes decimally and in twelfths.

Fig. 3- is a view showing the arrangement of the numeral keys for computing twelfths with the associated type heads which are arranged toprint the whole numbers .in lower-case and in fractions in uppercase.

Fig. 4: is a fragmentary view in elevation,

Specification of Letters Patent.

COMBINED TYPEWRITING AND COMPUTING MACHINE.

Patented Mar. 2, 1920.

looking from the back forward, With parts in section to show the arrangement of drive and carrying fora fractional dial wheel.

Fig. 5 is a spread perspective view show ing' the driving arrangements and carrying train for a fractional dial wheel computing twelfths.

Fig. 6 is an enlarged 'vertical section taken from front to rear through one of the totalizers at a point showing a decimal dial wheel and mechanism for driving same.

Fig. 7 is an enlarged view similar to Fig. 6. showing the driving and carrying mechanism for a fractionaldial wheel computing twelfths.

Figs. 8, 9 and 10 are views similar to Fig.

7. showing dial wheels arranged to compute eighths, fonrteenths and twenty-fourths, respectively.

Fig. 11 is a fragmentary View in front elevation showing three different types of computing heads which may be used with'a single actuator or master wheel mechanism.

' Fig. 12 is a view similar to Fig. 3, except that is shows an arrangement of keys and type-heads for computing eighths as well as whole numbers.

Fig. 13 is a detail perspective view of a dial wheel, like the one of Fig. 5, for computing twelfths, and adapted to compute pence.

Alphabet keys 1 and numeral keys 2 de press key levers 3 to rock bell cranks 4:, so to swing type-bars 5 up rearwardly against the front side of a. platen 6, mounted to rotate on a carriage 7. The carriage 7 travels on ways 8 under the impulse of a spring barrel (not shown). The movement of the carriage is ste) by step under the control of the keys. This is done by providing a rack 9 pivotally connected. to the-carriage and meshing with a pinion 10 controlled in its rotation by an escapement wheel 11, alternately engaged by fixed and pivoted dogs The dogs 12 are rocked by a universal frame 13. which in turn is rocked by heels l-l provided on each of the type-bars 5.

Each of the type-bars 5 is provided with two different types 15 and 16, the former being lower-case and the latterupper-case 2O discloses that the corresponding types have The invention is intended to include computing in different systems of measurement such as the English or sterling monetary system, which computes in twelfths, tenths or decimally, and other fractional measuring systems such as twenty-fmirths, fourteenths and the like. Theamounts printed by the numeral keys 2 through the associated types 15 and 16 are so adjusted that theyalways hear the same proportion to each other, whatever their actual magnitude. For example, for the computing head mechanism shown in Figs. 2, l and 5 wheel, which will compute in twelfths, the numeral keys in addition to the whole numbers 1, 2, 3 up to 9 are inscribed with fractional indications 1;, etc., up to 2-, respectively. Two additional keys are provided 'or 10'and 11 and their fractions ant This is shown in Fig. 3, which also the same whole numbers and fractional values to correspond with their associated keys. As indicated in Fig. 12, a set of types is adapted to be used for and the keys are correspondingly marked with the whole numbers and fractions which they are to: compute and typewrite.

In order to enable the change from printing in whole numbers, or lower-case characters, to printin in upper-case, or fractional characters, when computing fractional values, there are provided one or more caseshift keys/17, which, when one of them is depressed, rocks a keylever 18 to swing forward an arm 19 engaging in back of a shift frame 20 mounted to oscillate about the aXis of a shaft 21. The shift frame 20 is provided at its forward end with a shift rail 22 engaging under a plurality of rollers 23, so as to raise an inner carriage or frame Ql on which they are mounted. This inner carriage or frame supports the platen 6 and, in turn, is mounted onthe carriage 7 by means of arms25 whereby it may have its iip-and-do vn movement.

In the present improwment the numeral keys are arranged to con'lpute, whentypewriting, with'both upper and lower case types. For this purpose each of the numeral keys is provided with a differentiator 26. These differentiators have cam. slots 27 therein, which are varied in their conformation according to the values of the associated keys so that tiey will give graded rocking movements to a bail 28 according to the values of the operated numeral keys. That is to say, the 1 numeral key will give one unit of movement, the '2 numeral key two units of movement, the 3 numeral key three units of movement, and so on up to the maximum. f

The bail 28 is provided with a. pin 30, which, when the machine is connected for computing, as well-as typewriting, engages having a fraction computing eighths.

frame 13 which is actuated to between pommels 31 on a humpback interponent 32 and forms partof an oscillator which includes a lever 33 pivotally mountedon a shaft 34-. The intei'ponent is pivoted to the lever at 35 and is normally held by means of a. spring 36 with the dip therein between the pommels 31 located in engagement with the pin 31, so as to form a positive connection between the oscillator and the bail. That is to say, the position of the interponent 32 determines whetherthe machine will be operated for computing purposes as well as vfor typewriting, or solely for typewriting. Ordinarily, with the spring 36 in action the mechanism will be capable of computing as well s typewriting If it should be desired to silence the computing part of the mechanism the interponent 32 will be depressed out of operative-connection with the pin 30, and thus the bail 28, by means of a shifter 37, engaging the same. This shifter is rocked by a link 38, in turn actuated by a handle 39.

If the handle 39 is in its connected position every time a numeral key is actuated, the oscillator including the lever will be rocked an amount corresponding to the particular numeral key actuated. This in turn will draw down on a link 39 so as to rock a bell crank 40 located adjacent to the upper front of the typewriting machine frame 41. The other arm of the bell crank 10, than that with which the link 39 is connected, swings forward a link 42, which is connected at its front end to a rack 13. The rack 43 is normally in mesh with a pinion 44, so that during this forward movement the pinion M will be rotated an amount corresponding to the. particular numeral key actuated. This valuating or indexing driving movement of the pinion 4A and the shaft 45 on which it is mounted takes place during the first part of the down stroke of the actuation of a numeral key.

In order that the numeral key and the -'ack 43 actuated by the numeral key may return idly, it is disconnected from the pinion 44 so as to be ineffective thereon at the very last partof the down stroke of the numeral key: This is done by the universal effect an escapement movement of the carriage. That is to say, the same action which starts an escaping movement of the carriage also disconnects the rack bar 43 from the pinion 44:.

The universal frame 13 when oscillated backward swings rearwa-rdly the upper part of a supporting frame 4T6 on which it is pivotally mounted. 0n the opposite side of a pivot 47 of this swinging frame is provided an arm 48 which swings upwardly an enaging arm 49. The arm 49 is secured to a tion. A second arm of the bell crank 60 is 7 provided with a pin 62 which engages a second slot 63 in the driving rack bar 43.

It will thus be seen that no matter what the forward extent of driving movement .the rack bar 43 has had when the actuated numeral key makes its downward movement and thus completes the extent of its valuating or indexing drive, the act of the typebar in operating the escapement universal frame 13 will cause, through the connected mechanism, a horizontal downward movement of the driving rack bar 43 so .as to dis connect it from the pinion 44. The same movement that disconnects the driving rack.

bar also insures that the pinion 44 shall not be overthrown or accidentally moved when the rack bar 43 is disconnected therefrom.

F or this purpose the double bell crank 60 v is provided with a third arm 64 which has a locking tooth 65 forced into engagement between the teeth of the pinion 44 as the bell crank 60 rocks to disconnect the rack bar 43. \Vhen the numeral key returns, the driving rack bar is also returned, but idly, with respect to and disconnected from the pinion 44. In order that the driving rack bar 43 may not have asubsequent forward movement before it has completed its return movement, the lower side of the rack 43 has one-way facing teeth 65 engaged by a spring-pawl 66. A premature rengagement of the driving rack 43 is prevented by a lock 160 whose function and action are more particularly described in my application above mentioned. Sufficient is to say that this lock maintains the rack bar in its depressed position until it arrives at its home position, when the lower arm of the bell-crank 40 trips the latch by engagement with a stop 161, so that as the numeral key reaches its normal raised position, the rack will be permitted to rengage the gear 44 and the carriageescapement mechanism permitted to act. I

Thepinion 44 is of the barrel type, see Fig. 2, so that it can be shifted along the shaft 45 and still maintain its driving relation with the rack bar 43. The shifting is done so that a gear 67 secured for rotation therewith may selectively mesh with a gear 68 or a gear 69. The, gear 69 drives the gear 68 through the intermediary of a gear 70 secured'to a common hub 71- with the gear 69. That is to say, the gear 67 may drive the gear 68 either directly, for a rotation in one direction, or indirectly through the gears 69 and 70, efie'cting a rotation in the opposite direction. In one case it will cause an adding computation, and in the other case a subtracting computation. The gear 68'is connected to drive a master wheel 72 The master wheel may drive individual computing wheels 73 of one or more totalizers or computing heads 74. The dial wheels are in the form of gears having thick broad teeth, so that the digits and fractions which they compute may be inscribed on the points of the teeth, as shown in Fig. 13. The con nections between the computing wheels 73 and the dial wheels 75 which they drive will be more or less direct according to whether the dial wheels compute decimally or in common fractions.

There are anumber of different styles of heads embodied in the present invention. In fact, the present invention'is intended to include the use of two or more different styles of computing. heads for one travel of the carriage. F or example, as shown in Fig.

11. three diii'erent types'of heads are used.

on the machine at the same time. Head A is astraight decimal computing unit. Head I3 is a decimal computing unit with the addition of a wheel for computing twelfths. Head C is a sterling computing unit arranged to compute pounds, shillings and pence. As shilling is merely a decimal order, the only wheel which is an ultra-decimal wheel will be the pence wheel, which computes twelfths. ()ther styles of computing heads having the wheel of lowest denomination con'ip-uting in other common fractions. may be used. In Figs. 7. S, 9 and 10. fractional wheels'computin respectively, twelfths, eighths, fourteenths and twenty-fourths. are shown. For the computing wheels of higher denomination than the lowest, inasmuch as they are all decimal, a dlrect drive, such as that shown in Fig. 6, may be used. where the gear 73 actually meshes with and drives the dial wheel 75. In the case of the fractional dial wheels which are wheels of lowest denomination. indirect drives from the gears 73 are used. The distance between the axes of the gears 73 and 75 are maintained the saline in all. cases, so that all the computing wheels and all the dial wheels'are respectively of one size, and each set of wheels is journaled on a single axle. The variations of the driving ratio are obtained by intermediate gears meshing with the gears 73 and 75, and the use of theseintermediate gears is made possible by having the markings on the fractions wheel in such order that it can turn oppositely to the decimal wheels in effecting computations.

In the case of twelfths, as shown in Figs. 5 and 7, a thick toothed gear 77 is. driven also used similar to those in Fig.

toothed dial wheel or gear 75.

other dial wheels.

by the gear 73; the teeth being six in number, via, the teeth of a twelve-toothed wheel with spaces between the alternate teeth filled in and having the same pitch as the gear 73. Fixed to the gear 77 there is provided a gear 78 havingsix teeth like the gear 77, except that the alternate teeth are cut away, so that the remaining teeth mesh with and drive the dial wheel 75 having twelve teeth for computing twelfths. stated above, each tooth ot' the dial 75 is made thick and broad so as to have the numbers, or, in this case, fractions which they compute, inscribed on the points of the teeth. The gear 77 is rotated twice in one and twotents of a. revolution of the gear 73, and

the pinion 78, in turn, will rotate the dial wheel or gear 75 one complete revolution,

- or twelve units of movement.

For 'a fractional dial wheel computing eighths, viz., a base smaller than 10, as

shown in Fig. 8, two intermediate gears are 7 The first gear meshing with the gear 7 3, indicated at 79, has but four thick teeth, so that it will complete two revolutions when the gear 73 has made but eight-tenths of a revo lution. The gear 79 has another gear 80 of substantially the same diameter with twelve teeth therein, which meshes with a twentyfour tooth gear 81; secured to the eight- T he. dial. wheel or gear 75 has in this case the eight fractional parts of a unit inscribed in order on the points of the teeth which are thick and broad for this purpose, the same as the In Fig. 9,.a fraction dial wheel 75 computes fourteenths and is driven from the usual gear 73 by a seventooth gear 82 meshing with gear 73 having fixed to it a seven-tooth gear 83, which mesheswith and drives the dial wheel 75. In the case of computing twenty-fourths, as shown in Fig. 10, a twelve-tooth gear 8 1 of proper diameter is driven by the gear 73 and has secured thereto a twelve-tooth gear 85. Gear 85 meshes with and drives the dial wheel which has twenty-tourteeth in this case.

For the purpose of carrying ten s in the case ofthe dial wheels which are decimal. every tenth tooth on the gear 73 is broadened, as at 86 Fig. 2, so as to drive the opposite one of a series of tens-carrying gears 87 mounted to rotate e o-axially with the master wheel 72. As the computing heads are mounted on the typewriter carriage 7 to travel with the same. the tens-carrying wheels 87, like the master wheel 7:2, are stationary. At each letter-space stopping point of the carriage, and thus of the computing heads, the tenscarrying wheels 87 will overlaptw-o of the gears 73, the lower gear to; the extent of engaging the broad tens-carrying teeth 86, and the upper gear mentioned care is'taken so that the ear- 73 will not get out of register with the master wheel or the tens-carrying wheels. Provision is also made so that the tens-carrying wheels will be locked, except when actually in use for av tens-carrying operation. The structure for accomplishing this comprises locking dogs 88 engaging carryover wheels 87 and held 1n action hghtly by means of springs 89, operating on bell cranks 90 which in turn engage the dogs 88; it also comprises a bail 91 operated by a rather strong spring 92 engaging all. of the dogs 88.. Positive locking is accomplished by levers 93 carried by the totalizers and normally held with the lower ends 94 thereof in back 01 the dogs 88 to block their uni'neshing with the tens-carrying wheels 87. When the corresponding gear 73, and asso ciated dial wheel make a revolution, a de pression 95 in the gear 73 permits an enlargement 96 on the lever 93 to drop therein so as to admit of a rocking of the lever 93 and thus a release of the corresponding dog 88.

.ln the case of the totalizers computing ultra-decimally, the carrying from the lowest computing wheel to the next higher computing wheel is more indirect. In Fig. 5, where a dial wheel computing twelfths is shown at the upper side thereof, there is secured for rotation therewith a gear 97. which meshes with and drives a. gear 98 having secured thereto a single tooth starting, or carryover gear 99. This carry-over, or starting gear 99, once in every revolution of the dial wheel 75 rotates a ten-tooth gear 100 one-tenth of a revolution. This gear 100 is secured to a shaft 101 on which is formed a shoulder 102, on which the gear 73, which drives the twelfth computing dial wheel, is rotatively mounted. The gear 73 is spaced from the gear 100 by means of a shoulder 103. Secured to the shaft 101 on the opposite side of the gear 73 from the gear 100 is a ten-tooth gear 104, which may be considered a carry-over wheel-and which corresponds in diine-nsions'to the gear 73 and meshes, through the intermediary of a carry-over wheel 87, with the next higher dial wheel, This meshing with the carry-over wheel 87 results from the fact that the gear wheel 73 of Fig. 5 occupies only the part of a letter-space occupied by the narrow teeth of the ordinary computing wheels, while the gear wheel 104 covers only the space of the extensions 86 of the computing wheel teeth. Thus it will be observed that althou h the twelfthsl dial be the units of shillings dial wheel, also computing decimally. A similar train of gearing can be used in the case of totalizcrs computing in common fractions, other than twelfths, so as to 'take care of the carrying from the computing wheel of lower de nomination to the higher computing wheels of decimal character.

The totalizers 74 travel'with the typewriter carriage '7 in the manner described in my above-mentioned application, and are held thereon by a latch 105 which engages in a rack 106, mounted on the carriage. To

prevent the computing wheels from rotating when not being driven, there is 'provided a detent 107 held inaction by a spring 108. This detent is released by thefldriving rack bar 43 as it starts forward in its movement.- For this purpose the rack bar is provided with adepression 109 inwhich an arm 110 rests when the driving rack bar 43 is in its home position. Then the rack bar starts forward it cams the arm 110 on to a level 111, which action causes the arm to rock a second arm 112 secured thereto.

The'arm 112 engages and rocks a bell crank 113 which has a hook 114 arranged to release the lock 107. The bell crank 113 is also provided with a wedge 115 arranged to engage between teeth 116 of a rack provided on each ofthe totalizers, so as to justify the position of the gears 7 3 with respect to the master wheel and the-carry-over wheels, and also so as to prevent any traveling movement of the totalizer in action while the master wheel is actually driving the computing wheels.

Variations may beresorted to within the scope of the invention, and portions of the improvements may be used without others. Having thus described my invention, I

claim: 1

1. The combination with a decimal dial withsaid shaft, a computin wheel for said non-decimal dial wheeloosely mounted on said sleeve, gearing whereby said lastmentioned computing wheel actuates said vnon-decimal dial wheel, a train of gearing by means ofv which said non-decimal dial wheel, upon the completion of each rotation, turns said sleeve one step, and means, including a gear wheel fixedly mounted on said sleeve between thecomputing wheel for the non-decimal dial wheel and "the computing wheel for the'de'oimal computing decimal ly,

dial wheel, for transmitting said single step movement of said sleeve to said decimal computing wheel.

2-. The combination with a decimal dial wheel, of an ultra-decimal dial wheel lower in denomination than said decimal dial wheel, a gear below said ultra-decimal dial wheel driven thereby, a second gear driven by said first gear, a one-toothed starting member driven by said second gear, a third gear driven by said starting member, a rotatable member driven by said third gear extending to a point above said ultra-decimal dial wheel, and means, including a carryover wheel .fixed on said rotatable member above said ultra-decimal dial wheel, for driving said decimal dial wheel when said ultra-decimal dial wheel completes a revolution. H

3. In a combinedtypewritin and computing machine, the combination with a traveling carriage and amaster wheel, of a totalizer comprising decimal dial wheels and a computing wheel for said non-decimal dial wheel, a gear between said last-named computing wheel and its dial wheel, and a separately revoluble section of said last-named computing wheel adapted to be revolved separately by its dial wheel to effect carryovers. r

'4. In a combined typewriting and computing machine, the combination with a traveling carriage and a master wheel, of a totalizer comprising decimal dial. wheels and computing wheels constantly iii mesh with said dial wheels, a non-decimal dial wheel, a com puting wheel forsaid non-decimal dial 1 wheel, a gear between said last-named computing wheel and its dial wheel, a separately revoluble portion of said computing wheel to effect carry-overs, and gearing between said separately revoluble portion and its dial wheel adapted to intermittently rotate said portion to effect carry-overs.

5. In .a' combined typewriting and computing machine, the combination with a master wheel and a traveling-carriage, of

, decimal dial wheels, a common axle for said dial wheels, decimal computing wheels, a

common axle for said computing wheels, a

non-decimal dial wheel journaled on the decimal dial wheel axle, a special computing wheel for said non-decimal dial wheel j0urnaled onthe computing wheel axle, said special computing wheel being offset from its dial wheel, a gear between said special computing wheel and its dial wheel, to cause them to always revolve together, and a separately revolu le portion of said special computing wheel geared to said non-decimal dial wheel to effect carry-overs therefrom.

6. In a combined typewriting and com-" puting machine, the combination with a master wheel and a traveling carriage, of

' decimal dial wheels, a common axle for said dial wheels, decimal computing wheels, a common axle for said computing wheels, a non-decimal dial wheel journaled on the decimal dial wheel aXle, a special computing wheel for said non-decimal dial wheel journaled on the computing wheel axle, said special computing wheel being offset from its dial wheel, a differential gear between said special computing wheel and its dial wheel, to cause them to always revolve together, a separately revoluble portion of said special computing wheel, a train of gearing between said non-decimal dial wheel and said separately revolubleportion, and a tooth in said gearing adapted to intermittently rotate said separately revoluble portion to effect carryovers. v

7. In a combined ty ewriting and computing machine, the'com inatibn withdecimal dial wheels, all turning in one direction, and a computing-wheel for each dial wheel, constantly in mesh with its dial wheel, of' a non-decimal dial wheel, a computing wheel for said non-decimal dial wheel, and connections whereby said non-decimal dial wheel revolves in the opposite direction from said decimal dial wheels.

8. In a combined typewriting and computing machine, the combination with a traveling carriageand a letter-feeding escapement therefor, of a master wheel, a pair of decimal dial wheels adjacent each other, a computing wheel for each dial wheel and constantly engaging its wheel, printing keys for the typewriter adapted to revolve said master wheel, and to print in successive letterspaces to effect computations on said dial wheels, a non-decimal dial wheel, a special computing wheel for said non-decimal dial wheel adapted to be engaged by the master wheel at the next adjoining letter-space, and a gearing adapted to cause decimal rotations of the special computing wheel tobe carried as non-decimal rotations into the 311011- decimal dial wheel.

9. In a combined typewriting and computing machine, the combination with a traveling carriage and a letterfeeding escapement therefor, of a master wheel, a pair of decimal dial wheels adjacent eachother, a computing wheel for each dial wheel and constantly engaging its dial wheel, print-ing keys for the typewriter adapted to revolve said master wheel, and to print in successive 'letterspaces to effect computations on said dial wheels, a non-decimal dial wheel, a spe'cialcomputing wheel for'said non-decimal dial Wheel adapted to be engaged by the master wheel at the next adjoining letterspace, a gearing adapted to cause decimal rotations of the special computing wheel to be carried as non-decimal rotations into the non-decimal dialwheel, a separately revowheel, a sleeve on which said portion is fast,

altd forming a journal for the other portion of said wheel, and afgear on said sleeve forming part of a carry-over device for said wheel.

v 10. The combination with a plurality of decimal dial wheels and a plurality of computing wheels therefor, each constantly in mesh with its dial wheel, all said wheels being of uniform size, of a non-decimal dial wheel, a computing wheel therefor of the same size. as the other computing wheels, and a differential gear between said lastnamed computing wheel and said non-deci mal dial wheel adapted to cause decimal rotations of the computing wheel to be con vertedinto non-decimal rotations of the dial wheel.

11. In a'compliting machine, the combination with a traveling carriage and a master wheel, of decimal dial wheels, a non-decimal dial'wheel, a computing wheel for each dial-wheel and having teeth, and geared to be released therefrom .to enable computations to.be effected.

12. In acomputing machine, the combination with a traveling carriage and a master wheel, of decimal dial wheels, a nondecimal dial wheel, a computing wheel for each decimal dial wheel, a special computing wheel for the non-decimal wheel, said last-named computing wheel comprising two separately revoluble portions, and. a bar universal to all the computing wheels adapted to lock them and to be released therefrom to; enable them to be turned to effect computations.

13. In a computing machine, the combination with decimal dial'wheels and decimal computing wheels, having teeth, adapted to effect carry-overs for said dial wheels, of a non-decimal dial wheel, a special computing wheel forsaid non-decimal dial wheel,

wheels, and also having a portion adapted to be separately driven to effect carry-overs;

carry-over wheels relatively to which said computing wheels travel, and a train of gearing on the side of said non-decimalg wheel, away from the decimal wheel, connecting said non-decimal wheel to the separately revoluble portion.

14. In 'a computingmachine, the combination with a series of decimal dial wheels, and a series of decimal computing wheels therefor, of a master wheel,- a non-decimal dial wheel, a non decimal computing wheel therefor, said non-decimal computing wheel and non-decimal dial wheel being of the same size as the respective decimal dial and computing wheels, carry-over wheels relatively to which said 'dial and computing wheels travel as a unit, and gearing between the non-decimal computing wheel and the non-decimal dial wheel to enable the master the second portion and its dial wheel adapted to intermittently rotate said second porwheel and the carry-over wheels to carryover non-decimal units therefrom into the decimal dial wheels.

.15. In a computing machine, the combination with decimal wheels and a non-deci- 'mal wheel, of a computing wheel for each decimal and non-decimal wheel constantly for connectingv said computing Wheels to effect carry-overs, said non-decimal computing wheel being in two portions, one portion being differentially geared on one side of saidv non-decimal wheel to effect turning thereof, and the other portion being differ= entially geared to the other side to effect carry-overs therefrom.

16. In a computing machine, the combination with decimal wheels and a non decimal wheel, of a computing wheel for each decimal and non-decimal wheel constantly meshing therewith, a master wheel adapted to engage said computing wheels successively to turn them, andcarry-over wheels for connecting said computing wheels to effect carry-overs, the computing wheel for said non-decimal. wheel being in two. por-- tions, one portion being differentially geared to one side of said non-decimal wheel to ef* fect turning thereof, and the other portion being differentially geared to the other side to effect carry-overs therefrom; the gearing to effect turning being constantly in mesh, and the gearing to effect carry-overs comprising a gear wheel having a toothed and a toothless portion adapted to intermittently be effective.

17. In a computing machine, the combination with decimal dial wheels and decimal computing wheels constantly in mesh therewith, of a master wheel, identical carry-over wheels for connecting said computing wheel together to effect carry-overs. a non-decimal dial wheel, and a non-decin'lal computing wheel comprising two separately revoluble portions, one portion being constantly in ble portions, one portion being constantly in driving relation with its dial wheel to enable the master wheel to turn it, and the other poition adapted to be separately turned to effect carry-overs, said portions having identical teeth, andgearing between tion to eflect carry-overs.

19. In a combined typowriting and computing machine, the combination with a traveling carriage and a master wheel, of a totalizer comprising decimal dial wheels and computing wheels constantly in mesh with said dialwheels, a non-decimal dial wheel, a computing wheel for said non-decimal dial wheel, a gear between said last-named coniputing wheel and its dial wheel, a separately-revoluble section of said last-named computing. wheel adapted, to be revolved separately by its dial wheel to effect carryovers, typewriter keys adapted to drive said master wheel-decimally, and a typewrlter Lkey adapted to drive said, master wheel so that itwill turn more thannine units, said last named keyadapted to simultaneously print the digits representing the number of units the master wheel turns.

20. In a computing machine, the combi nation with a master wheel of less than letter-spac'e width, and a series of carry-over wheels of substantially letter-space width, of a traveling totalizer comprising decimal dial wheels, a non-decimal dial wheel, computing wheels constantly in mesh with said decimahdial wheels and adapted to cooperate with said carry over wheels, a computing wheel for said non-decimal dial Wheel having the same number ofteeth as said computing Wheels for the decimal dial wheels, all of said computing wheels being brought into mesh with said master wheel during their travel past the same, gearing through which said non-decimal dial wheel is driven a number of steps. corresponding tot-he number of steps its computing wheel is actuated, an auxiliary wheel of the same number of teeth as said computing Wheels and positioned to be brought into mesh with said carry-over rotation of said non-decimal dial wheel,

thereby effecting carry-over through one of said ca rry-over wheels to the non-decimal d al wheel of lowest order by means of its computing wheel.

21. The combination with a decimal dial wheel, of a non-decimal dial wheel lower in denomination than said dial wheel, a rotatable member, a computing ,wheel for said non-decimal dial vwheel mounted on said rotatable member for rotation with respect thereto, gearing whereby said computing Wheel drives said non-decimal dial wheel,

and means to effect carry-over from said non-decimal dial wheel to said decimal dial wheel comprising a'gear fixedly mounted on said rotatable member between said dial wheels, and means whereby said rotatable -member is driven by said non-decin'ial'dial wheel.

22. In a con'iputing machine, the combination with a master wheel of less than letterspace width, and a series of carry-over during the movement of the totalizer .past' said master wheel, means for driving said non-decimal dial wheel from its computing wheel the same number of steps that any one of said decimal dial wheelswould be driven if its computing wheel were actuated to the.

same extent, an auxiliary wheel of the same radius as and in alinement with said computing wheels, said auxiliary wheel being narrow and so spaced that it will not be in mesh with said master wheel when the totalizer is at rest, and means, actuated by the-computing wheel for the non-decimal dial wheel, to drive the auxiliary wheel one step at the completion of a rotation of said non-decimal dial wheel, and thereby carry over to the decimal dial wheel of lowest denomination through the carry-over wheel in mesh with the auxiliary wheel and the computing wheel for the decimal dial wheel of lowest order.

HENRY L. PITMAN. Witnesses:

ARTHUR A. JOHNSON,

JENNIE P. THORNE. 

